Photoionization of the3d,3p, and3ssubshells of Zn i

Abstract

The photoionization cross sections of the $3d$, $3p$, and $3s$ subshells of Zn i are calculated from threshold to 1000 eV. Electron-correlation effects are included using a low-order perturbation expansion obtained from many-body perturbation theory. The $3d\to \mathrm{kf}$ cross section is also calculated in the exact single-channel random-phase approximation with exchange. Autoionizing resonances due to the $3p^5\mathrm{ns}$ and $3p^5\mathrm{nd}$ configurations are included in the $3d\to \mathrm{kf}$ cross section, and the effect of core relaxation is considered. The effect of single-channel and multichannel correlations is included in all subshell cross sections.